OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:c8:46:67
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:aa:a6:a4:68:1c:bf
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:12:0e:ca:10:a3:98
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:ea:6d:f5:b0:fb:f1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:c8:46:67
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
